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758836-B21 — Storage Datasheet

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HPE · RAID CONTROLLER
WHAT YOU NEED TO KNOW
Naming: -i=Internal | -e=External | -a=Type-a modular | -c=Mezzanine SR=SmartRAID (cache) | E=Entry (no cache, HBA-like)
Smart Storage Battery SOLD SEPARATELY — no battery = no write-back cache
PRODUCT OVERVIEW

HP Smart Array FBWC 2Gb Kit for P420 P421 includes FL Capacitor with 36in Cable. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
758836-B21
SPECIFICATIONS
Part Number758836-B21
ManufacturerHPE
Capacity2GB
COMPONENT DIAGRAM
RAID ASIC CACHE FBWC SAS 0 SAS 1 SAS 2 SAS 3 BATT EXT 0 EXT 1 PCIe x8 ~187 mm STORAGE CONTROLLER | RAID 0,1,5,6,10 | PCIe SAS/SATA | FBWC cache | Battery backup connector | TITLE RAID CTRL PN 758836-B21 MFR HPE HP Smart Array FBWC 2Gb Kit for P420 P42
KEY FEATURES
•
2GB Capacity
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
VERIFIED SUBSTITUTES & CROSS-REFERENCES 1
631681-B21CompatiblePARTNER
HP Smart Array FBWC 2Gb Kit for P420 P421 includes FL Capacitor with 36in Cable
compatible
LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 3
610675-001SUBSTITUTE
HP Smart Array FBWC 2Gb Kit FIO for P830i includes FL Capacitor
HPE
631681-B21SUBSTITUTE
HP Smart Array FBWC 2Gb Kit FIO for P830i includes FL Capacitor
HPE
633543-001SUBSTITUTE
HP Smart Array FBWC 2Gb Kit FIO for P830i includes FL Capacitor
HPE
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FREQUENTLY ASKED QUESTIONS
What is 758836-B21?
758836-B21 is a HP Smart Array FBWC 2Gb Kit for P420 P421 includes FL Capacitor with 36in Cable manufactured by HPE.
What parts can replace 758836-B21?
There is 1 known substitute for 758836-B21: 631681-B21. Substitute compatibility should be verified for your specific system.
Is 758836-B21 still available?
758836-B21 is currently Unknown.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: October 2026